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Full-Text Articles in Computer Engineering

Mutual Interference Investigation Of Cebus And X-10 Powerline Signaling, Sajid Pallithotungal Aug 1999

Mutual Interference Investigation Of Cebus And X-10 Powerline Signaling, Sajid Pallithotungal

Theses

Powerline control signaling using CEBus has great potential towards inexpensive home automation. CEBus transmits at 10 kBps using spread spectrum in the 100-400 kHz band while X-l0 sends 60 Bps using bursts of 120 kHz carrier on the power line. However, these two signals may destructively interfere when present simultaneously. X-10 is narrow band and interferes with the CEBus spread spectrum signal. This thesis looks into the mutual interference patterns of Power Line CEBus communication in the presence of X-l0 module signaling and visa versa. The investigation encompasses a series of tests and measurements on a Power Line CEBus-X10 test ...


Information Technology And Firm Boundaries: Evidence From Panel Data, Lorin. M. Hitt Jun 1999

Information Technology And Firm Boundaries: Evidence From Panel Data, Lorin. M. Hitt

Operations, Information and Decisions Papers

Previous literature has suggested that information technology (IT) can affect firm bound- aries by changing the costs of coordinating economic activity within and between firms (internal and external coordination). This paper examines the empirical relationship between IT and firm structure and evaluates whether this structure is consistent with prior arguments about IT and coordination. We formulate an empirical model to relate the use of information technology capital to vertical integration and diversification. This model is tested using an 8- year panel data set of information technology capital stock, firm structure, and relevant control variables for 549 large firms.

Overall, increased ...


The Myth Of Private Ordering: Rediscovering Legal Realism In Cyberspace, Margaret Jane Radin, R. Polk Wagner Jan 1999

The Myth Of Private Ordering: Rediscovering Legal Realism In Cyberspace, Margaret Jane Radin, R. Polk Wagner

Faculty Scholarship at Penn Law

No abstract provided.


A Digital Library For The National Advisory Committee For Aeronautics, Michael L. Nelson Jan 1999

A Digital Library For The National Advisory Committee For Aeronautics, Michael L. Nelson

Computer Science Faculty Publications

We describe the digital library (DL) for the National Advisory Committee for Aeronautics (NACA), the NACA Technical Report Server (NACATRS). The predecessor organization for the National Aeronautics and Space Administration (NASA), NACA existed from 1915 until 1958. The primary manifestation of NACA's research was the NACA report series. We describe the process of converting this collection of reports to digital format and making it available on the World Wide Web (WWW) and is a node in the NASA Technical Report Server (NTRS). We describe the current state of the project, the resulting DL technology developed from the project, and ...


Smart Objects, Dumb Archives: A User-Centric, Layered Digital Library Framework, Kurt Maly, Michael L. Nelson, Mohammad Zubair Jan 1999

Smart Objects, Dumb Archives: A User-Centric, Layered Digital Library Framework, Kurt Maly, Michael L. Nelson, Mohammad Zubair

Computer Science Faculty Publications

Discusses digital libraries, interoperability, and interfaces to access them, and proposes one universal protocol for communication for simple archives based on the hypertext transfer protocol (http). Describes the creation of a special class of digital objects called buckets, archives based on a NASA collection, and a set of digital library services. (Author/LRW)


Filters And The First Amendment, R. Polk Wagner Jan 1999

Filters And The First Amendment, R. Polk Wagner

Faculty Scholarship at Penn Law

No abstract provided.